package demo1;

/**
 * 使用两个线程来累加 count 的值
 * 每个线程循环 1w 次，累加变量 count 的值，count 默认值为 0，注意线程安全问题。
 */
public class Work00 {
    public static void main(String[] args) throws InterruptedException {
        Counter counter=new Counter();
        Thread t1 =new Thread(()->{
            for (int i = 0; i < 1_0000; i++) {
                counter.increase();
            }

        });
        Thread t2 =new Thread(()->{
            for (int i = 0; i < 1_0000; i++) {
                counter.increase();
            }
        });
        t1.start();
        t2.start();
        t1.join();
        t2.join();
        System.out.println(Counter.count);
    }
}
class Counter{
    public static int count=0;
    public void increase(){
        synchronized (Counter.class){
            count++;
        }
    }
}
